There are many different designs and configurations available, with popular units being free standing, traditional bath and bath with shower cubicle.
Free standing baths allow the unit to be set away from the wall with tiling or your chosen wall finish to run to the floor. Traditional baths come in a number of different lengths, with typical sizes ranging between 1500-1700mm long and 700-800mm wide.
The bath with shower cubicle adds a wider cube to one end of the bath, giving more comfort when showering. They typically give an extra 100-150mm of space at the shower end for movement.
Baths are available in Acrylic, steel, resin and iron to name but a few.